This sfc high descending into Mongolia & China is >+4σ on the GFS w/ accompanying T850s approaching -5σ. This is certainly one of the strongest East Asia cold surges & positive mountain torques I can remember watching in real-time. https://t.co/zTsCLFlcry pic.twitter.com/J8QKdcgVJj

— Eric Webb (@webberweather) December 22, 2020